Improvement in molds for casting sleigh-shoes



UNITED STATES ,PATENT GEEIcEI N. W. RUSSELL, OF CEDAR FALLS, IOWA.

IMPROVEMENT IN MOLDSIFOR CASTING SLEIGH-SHOES.

Specification forming part of Letters Patent No. 82,353, dated September 22, 1868.

To all whom it may concern:

Be it known that I, N. W. RUSSELL, of Cedar Falls, in the county of Black Hawk and State of Iowa, have invented a new and Improved Mold adapted for Casting Sleigh- Shoes; and l do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is a top view of the mold ready for pouring molten metal into it. Fig; 2 is a top view of the lower section of the mold. Fig. 3 is a side view of the mold. Fig. 4 is a longitudinal section taken through the mold in the vertical plane indicated by line w a: in Fig. 2, showing one of the thin coveringstrips for covering the mold-chambers while lling the cope or flask with sand. Fig. 5 is a transverse section of Fig. 4. Figs. 6 and@ are sections e, showing the castings in the mold.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to a new and useful improvement in the manufacture of cast shoes for the bottoms oi' sleigh-runners, whereby such shoes can be made more perfect and provided with greaterfacility and consists in producing these shoes in molds which are made partly of sand for the purpose of chilling the bottoms and sides of the shoes, and thus rendering these portions, which are subject to wear, much harder and more durable than they would be if cast in sand, and also for the purpose of preserving intact that portion of the mold which gives shape to the bottom and sides of the shoes, as will be hereinafter explained.

To enable others skilled in the art tounderstand my invention, Iwill describe its construction and operation.

i The upper section or cope of the mold consists of an oblong rectangular metal frame,A,

f with transverse bars at intermediate points between its ends, and with guide and stay pins a a c, for holding it in. place upon the lower section of the mold. The lower section B of the mold is made of metal, and constructed with grooves a a. on its sides for receiving the guide-pins a, and also with an eyepiece, d, upon one end for receiving the steadypin C. The upper surface of this mold-section B is covered, as shown in Figs. 3, 4, and 6, so as to conform to the curvature of the bottom of the upper section, and also to the curvature of the upper edges of the front ends of the shoes P, as shown in Fig. 6. In the upper surface of the lower section B a number of channels, g, are made, which, in crosssection, have' a slightly-flaring form, as shown in Figs. 5 and 7, and which are designed to form molds in which to produce the shoes. At the extremities of these channels g they communicate, by means of grooves t' j, with depressions which are made in cups f j" which cups are formed in the section B, and lled with molders7 sand, as shown in Figs.2, 4, and 6. I

In order to prepare the mold for casting, the channels g g in the section B are all covered by means of thin metal strips J, to prevent the sand from filling these channels, which strips fit into the channels so as to lie flush with the top surface of the lower section. The cap A is then adjusted in place upon the bottom section B, and lled with sand, which is rammed into it in the usual well-known manner of making sand molds. Sprue and air holes e e c e' are then made through the sand in the cope A, directly over the sand-cups f j", and this upper section carefully removed from the lower section. The covering-strips J are then removed, after'which the said cups f f' are properly lled and channeled, as shown in Fig. 2, and the cope returned to its place again, as shown in Figs. 6 and 7. The metal is then poured into the molds through two of the Sprue-holes at one end of the mold, and

as this molten metal ilows into and fills the several channels g, the air and vapor will escape at the opposite end of the mold.

The sand-cups, which are located directly beneath the sprue or pouring holes, are designed for protecting the metallic section B at these points, from being burned and destroyed by the molten metal as it rst enters the mold. The sand or other refractory substance in said cups will not suddenly chill the metal while flowing into the mold, nor will it allow the metal of the lower mold to be injured at these points.

Having described my` invention, whaty I 2. The coveringplates J, in'combination claim as new, and desire to secure by Letters with the channeled metal section B Vand sand Patent, iscope A, substantially in the manner and for l. The sand flask or cope A and metallic the purpose described.

mold-section B, constructed substantially as N. W. RUSSELL.

described, when used in combination with each Witnesses:

other for the production of sleigh-shoes,fas'set CEAS. P. BROWN,

forth. S. H. PACKARD. 

